delete asm_delib_6_12_001 a
where 
a.movimento ='L'
and a.pod = 
(select distinct b.pod from asm_delib_6_12_001 b
where
a.pod=b.pod
and a.datamisura=b.datamisura
and a.codcontrdisp=b.codcontrdisp
and b.movimento ='IA')